Wasn't ready for college

I did great in high school. But I've had the most terrible time in college. I really wanted to take a year or two to save money and work before started college. I wanted time to decide on what i really want to go into. But my mom forced me into going at 17, straight out of high school. I'm 19 now and I'm doing terrible. Do you guys think I should take that break to work (I'm so poor right now) and really decide on what I want ( I'm having doubts about the field I'm studying for) or should I just suck it up for another 3 years. My mom is still giving me a hard time about it though. She says I'll never amount to anything if I don't go to college.